4. What is sectionalism? a. Focus on the interest of one's region and only what impacts that region b. The belief that all regions should unite and share the same political, social, and economic values.| c. The idea that a country should expand its borders to include new territories. d. The practice of making decisions based on what benefits the entire nation instead of specific regions.

Sectionalism refers to a strong allegiance to a particular region, often leading to heightened tensions between different areas within a country. The term became especially significant in the United States during the 19th century as regional interests—particularly between the North and South—began to clash over issues like slavery and economic policies. This reflected how people's identities and priorities could often overpower national unity. In practice, sectionalism can lead to significant political and social divides. For example, decisions made by a government that favor one region over another can exacerbate existing inequalities and even lead to conflict, as seen in the U.S. Civil War. Understanding this concept is crucial as it highlights the importance of balancing regional needs with national interests, especially in diverse countries.